Year	annual %
1961	-0.7830801937989879
1962	-0.7601740892301942
1963	-0.7736054488766155
1964	-0.8268114514508741
1965	-0.8038537420024946
1966	-0.8633694552381999
1967	-0.8968675100091843
1968	-0.9696646834438518
1969	-1.0652034973575615
1970	-1.3224830034315471
1971	-1.5880254648397711
1972	-1.6955695258616537
1973	-1.8228231068790766
1974	-1.991304766829493
1975	-1.899510953059614
1976	-2.0223499566483927
1977	-1.9929609247024809
1978	-1.9529603787878873
1979	-1.9393245511045814
1980	-1.8744770526412546
1981	-1.8357181980914645
1982	-1.9017924643008597
1983	-1.9445671091602164
1984	-1.9997338097505983
1985	-2.016793011566336
1986	-2.0402093862523936
1987	-2.0903668013255374
1988	-2.526092787297813
1989	-1.7551606506188435
1990	-0.9672901244552088
1991	-1.1158247321779384
1992	-0.9529041899165138
1993	-0.9566301910447467
1994	-1.3003837667666502
1995	-1.5176180795133636
1996	-1.5347932925979995
1997	-1.6187038048242703
1998	-1.6617361487005342
1999	-1.8103995496214214
2000	-2.093120675138978
2001	-2.1413480527844917
2002	-2.278155233771172
2003	-2.3512983153794496
2004	-2.347178305310137
2005	-2.3581104360669998
2006	-2.2975295097519424
2007	-2.15428901139314
2008	-2.0548531463294926
2009	-1.9579801684864087
2010	-2.1734015056586746
2011	-2.2925873488933863
2012	-2.2293648074536407
2013	-2.125604190650974
2014	-2.041266953939362
2015	-1.9831481136237537
2016	-2.0382111796382416
2017	-2.249891015206848
2018	-2.344681141478023
2019	-2.3217685522186846
2020	-2.540556787266828
2021	-2.9314262817407473
2022	-2.8966149749239696
2023	-2.620893818282944